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Thread: 16887 Vehicle Speed Sensor Signal Too High

  1. #1
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    16887 Vehicle Speed Sensor Signal Too High

    I've been plagued with this error code ever since I got my TDI-swapped Audi A4 back on the road. I'm pretty sure it's the reason why my cruise control isn't working.

    Car is a 2001 Audi A4 Avant quattro that used to have an AWM 1.8T and manual trans. It now runs the engine, ECU and wiring harness from a 2005 Passat (BHW 2.0 PD TDI) mated to an 01E FTL 6-speed transmission. The TDI ECU is EDC16. There was a bit of wiring work needed to get the ECU to match up with the car's wiring, but it all went well and the car runs fantastic. The cruise control and this error code are the only thing left to resolve.

    When looking at the wiring diagrams for each car:

    - the VSS signal on the Passat goes to the transmission control module, which then gets sent to the instrument cluster and ECU (presumably via CAN bus).

    - the VSS signal on the A4 goes to the instrument cluster, which then gets amplified and sent to the ECU via a white/blue wire straight to a specific pin.

    I have it setup the A4 way, and it seems to work. It required adding a wire to an unused pin on the ECU. The speedometer is accurate and responds appropriately. However the reported speed in the ECU is always about 15% higher than the speedometer. I think this is where the error code comes from, and why the cruise control won't work.

    I did a LOT of research, and I can't figure out why this is happening. Lots of people have swapped an 01E transmission into the B5.5 TDI Passat (albeit a FWD one, not quattro), and they can get cruise control working fine. This is actually how I learned which pin to send the VSS signal to on the ECU, other people figured it out before me.

    As far as I know, the VSS ring works the same way on both cars. It has 8 magnetic poles that trigger a pulsed voltage on the VSS sensor, unless I'm wrong and the OEM Passat TDI automatic trans has 6 poles somehow... but then all those other 01E-swapped Passats would have had the same issue I'm having. So why is the ECU taking the signal that the instrument cluster is sending to it, and inflating the result by 15%?

    For the record, the ECU is coded for a manual transmission and the tune has all the right gear and final drive ratios entered. And since it was for a B5.5 Passat, tire size is identical between the two cars. I'm not the first person to mate this engine to an 01E, although I may be the first to do it on a B5.5 A4 quattro.

  2. #2
    Benevolent Dictator Uwe's Avatar
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    Moved to Retrofits.

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

  3. #3
    NostraJackAss Jack@European_Parts's Avatar
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    It would be a good idea to auto-scan to see the actual config...........
    European Parts Emporium/Performance / Immobilizer Solutions EPE
    Certified Master Trained NY/BAR/BAD 7076062/ASE/SAE/NASTF Legal Factory Authorized/Licensed GeKo/FaZit # 403738
    Specializing in Custom Services IE: "welding-fabrication" / EPA-SMOG Update or Pass-Thru-Programming / Data Transfer / Immobilizers & OEM Quality Parts
    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
    www.FixMyEuro.com <<<<<CLICK HERE! or vwemporium@aol.com ( JPPSG & Unverified members need not PM me & Please don't email or call facility for free tech support...use the forum )
    Getting you CONTROL again of your property - TAKE IT! In Conjunction with.........

  4. #4
    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by Jack@European_Parts View Post
    It would be a good idea to auto-scan to see the actual config...........
    He's got one in another thread:


    Quote Originally Posted by GoremanX View Post
    Code:
    Sunday,25,June,2017,13:49:33:60495
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
    VCDS Version: 17.1.3.0 (x64)  HEX-NET CB: 0.4341.4
    Data version: 20170320 DS267.7
    www.Ross-Tech.com
    
    
    Mileage: 278979   Repair Order: 
    
    
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
    Chassis Type: XX (8D - Audi A4/S4/RS4 B5 (1995 > 2002))
    Scan: 01 02 03 08 15 16 17 25 35 37 45 55 56 57 67 75 76 77
     
    VIN: XXXXXXXXXXXXXXXXX   
    -------------------------------------------------------------------------------
    Address 01: Engine        Labels: 038-906-016-BHW.lbl
       Part No SW: 038 997 016 N    HW: 028 101 198 2
       Component: R4 2,0L EDC G000SG  1388  
       Revision: 12345678    Serial number: XXXXXXXXXXXXXX
       Coding: 0150031
       Shop #: WSC 66565 257 00032
       VCID: 291A33BA81156D099E-5184
    
    1 Fault Found:
    16887 - Vehicle Speed Sensor 
                P0503 - 000 - Signal too High
                 Freeze Frame:
                        RPM: 966 /min
                        Torque: 84.0 Nm
                        Speed: 0.0 km/h
                        Load: 0.0 %
                        Voltage: 12.08 V
                        Bin. Bits: 00101100
                        Torque: 148.0 Nm
                        Torque: 0.0 Nm
    
    Readiness: 0 0 0 0 0 
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes        Labels: 8E0-614-111-EDS.lbl
       Part No: 8E0 614 111 A
       Component: ABS/EDS 5.3 QUATTRO D10  
       Shop #: BB 24334  
       VCID: 1C741A6E8E4788A115-51CE
    
    1 Fault Found:
    00285 - ABS Wheel Speed Sensor; Front Right (G45) 
                30-00 - Open or Short to Plus
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC        Labels: 8D0-820-043-1D.lbl
       Part No: 8D0 820 043 P
       Component: A4     KLIMAAUTOMAT D57  
       Coding: 00143
       Shop #: WSC 06325  
       VCID: 2D12C7AAE5FD712972-258E
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 15: Airbags        Labels: 8D0-959-655-AI8.lbl
       Part No: 8D0 959 655 G
       Component: Airbag Front+Kopf  1002  
       Coding: 00306
       Shop #: WSC 06325  
       VCID: 3A38FCF624B3D691E7-5160
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 17: Instruments        Labels: 8D0-920-xxx-17.lbl
       Part No: 8D0 920 980 Q
       Component: B5-KOMBIINSTR. VDO D09   
       Coding: 00240
       Shop #: WSC 00001  
       VCID: 393AE3FA21B5DD89EE-5160
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 35: Centr. Locks        Labels: 8D0-862-257.lbl
       Part No: 8L0 862 257 N
       Component: CV-Pump             D11  
       Coding: 16168
       Shop #: WSC 06325  
       VCID: 40CC8E1E426F8C41A9-4EEA
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 45: Inter. Monitor        Labels: 4B0-951-173.lbl
       Part No: 4B0 951 173 
       Component: Innenraumueberw.    D03  
       Coding: 00102
       Shop #: WSC 06325  
       VCID: 608C6E9EE2AFEC4189-4AC2
    
    No fault code found.
    
    End----------(Elapsed Time: 05:51, VBatt start/end: 12.3V/12.3V)-----------
    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

  5. #5
    NostraJackAss Jack@European_Parts's Avatar
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    Address 17: Instruments Labels: 8D0-920-xxx-17.lbl
    Part No: 8D0 920 980 Q
    Component: B5-KOMBIINSTR. VDO D09
    Coding: 00240
    Shop #: WSC 00001
    VCID: 393AE3FA21B5DD89EE-5160

    No fault code found.

    Put a TDI cluster in the car..................
    European Parts Emporium/Performance / Immobilizer Solutions EPE
    Certified Master Trained NY/BAR/BAD 7076062/ASE/SAE/NASTF Legal Factory Authorized/Licensed GeKo/FaZit # 403738
    Specializing in Custom Services IE: "welding-fabrication" / EPA-SMOG Update or Pass-Thru-Programming / Data Transfer / Immobilizers & OEM Quality Parts
    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
    www.FixMyEuro.com <<<<<CLICK HERE! or vwemporium@aol.com ( JPPSG & Unverified members need not PM me & Please don't email or call facility for free tech support...use the forum )
    Getting you CONTROL again of your property - TAKE IT! In Conjunction with.........

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